1uzfe - Are SC400 and LS400 engine harnesses interchangable?

[RedPhoenix]

Im about to pick up a SC400 1uzfe complete with a cut wire harness for $100.

My local (very cheap) junkyard always has a few LS400's but never an SC400.

Can I take an LS400 complete engine wiring harness and an LS400 ECU and directly bolt it onto my SC400 with no issues?

If I decide to... can I also use the LS400 engine plugs and solder everyone to my SC400 cut wiring harness and then use the LS400 ECU?


BTW, this is NOT for my SC. lol.

 

[sideshow]

if you plan to run the 1uz in a car that isnt a lexus then the ls400 loom should fit
if u use the ls400 ecu

only differences sometimes are the 6 and 2 pin plugs next to left hand side front injector
i know crown and sc400 are different
so just look at that section and see if they are the same

then u have the plug that does the knock sensors and starter might be different

then the auto section might be different

 

[cation]

if you plan to run the 1uz in a car that isnt a lexus then the ls400 loom should fit
if u use the ls400 ecu

only differences sometimes are the 6 and 2 pin plugs next to left hand side front injector
i know crown and sc400 are different
so just look at that section and see if they are the same

then u have the plug that does the knock sensors and starter might be different

then the auto section might be different

sideshow is right on about this. The starter solenoid wire/knock sensor harness connection is slightly different as is the connector at the front left hand side near the injector.

I know this first hand as I'm using a SC400 1UZ engine with a LS400 harness/ECU in my 240sx project. We just got it running last night without major issue so swapping harnesses will work with minor modification.

 

[RedPhoenix]

What are the 2 and 6 pin connectors for.

Anything else besides that?


Thanks for the replies!

 

[sideshow]

there is a sub harness at front of motor which does the craank and cam sensors and also the left hand coil

i know a crown is diff to a sc400 as i have drawn up the differences
but not sure if an ls400 is different
id think not

crowns are always diff to the rest

 

[cation]

In my case the SC400 sub harness on the engine had a two pin connector for the coil and a six pin for the LH cam sensor, crank sensor, and hydraulic fan pump solenoid. The LS400 harness will have a 4 pin connector where the 6 pin connector is on the SC400 if memory serves me correctly. I had a spare LS400 parts engine so I just used the front sub harness off of it to use with my LS400 harness/ecu.